Tuyere



06f. 27, 1931. Q 1 PARKER 1,829,055

TUYRE Filed May 16. 1927 Patented Oct. 27, 1931 UNITED STATES PATENT OFFICE CYRUS J'. PARKER, OF `IPORJIIILAND, OREGON; MARY E. PARKER, EXECUTRIX OF SAID CYB'US J. PARKER, DECEASED, ASSIGNOR TO IRON FIR-EMAN MANUFACTURING COMPANY, OF PORTLAND, OREGON, A CORPORATION man Application led Hay 18,

This invention relates generally to grates for burning coal, and particularly to grates for end feed stokes.

The first object of this invention is to provide an exceedingly simple andl efficient type of tuyere for use in connection with end feed stokers in,which the coal is fed upwardly past the tuyre by means of a screw (not shown).

The second object is to produce a tuyere in which the-openings will not be subject to' clogging on account of the spe'ial form of tuyre opening employed.

The third object is to so construct the tuyre element that it will lend itself to easy assembling and will not be apt to burn out on account of the cooling action of air on the under side.

These, and other objects, will become more apparent from the specification following as illustrated in the accompanying drawings. in which:

Figure 1 is a front elevation et' a tuyre element. of which Figure 2 is a vertical scction taken along the line 2--2 in Figure l. Figure 3 is a horizontal section taken along the line 3--3 in Figure 2. Figure' 4 is an enlarged section through the tuyre element slots taken along the saine plane as is Figure 2 and showing the tendency of coal and ash to fill the tuyre slots. Figure 5 is a perspective View of a number of tuyre units showing their relation to the coal bed and show-- ing the supporting .members for the tuyre clement.

Similar numbers of reference refer to sim-V ilar parts throughout the several views.

Referring in detail to the drawings, the tuyere element itself consists of an upright member whose side 11 is vertical and whose side 12 slopes upwardly from its lower corner 13. On the sides of the member 1() are formed the lateral projections 14. The projections 14 are made thicker at the 4middle than at the ends so that the spaces 15 between them are centrally constricted. Such structure will produce a Venturi effect on the air when thev elements are assembled to form a tuyere (as shown in Figure 5).

150 At the bottom of the member 10 is formed 1927. Serial N0. 191,609.

a pair of laterally extending lugs 16 Whose over-all width 1s the same as the members 15. is also carried out to the full width of the members 14 and is preferably provided with a groove 1S for the reception of the downturned flange 19 of the grate bar 20. The member 10 has an outwardly projecting portion 21 from which extends an upright p0rtion 22 which connects with the under side of the portion 17 containing the groove 18.

The under side Q3 rests upon the T bar 24 and the inwardlyY projecting tongue 25 locks under the flange Q6 of the fuel feeding trough 27 (shown in part) which contains the feed screw `(not shown).

The operation of the device is as follows: lVhen coal is fed upwardly by the worm (not shown) it naturally moves outwardly under the pressure of the worm and, due to the expansion of the coa-l caused by the heat being The top side 17 of the tuyere element generated above same, causes particles of coal 28 and ashes Q9 to fall into the discharge ends of the Venturi openings, where it would remain were it not for the fact that a strong current of air is constantly issuing from these openings.

I am aware that many dierent forms of tuyre elements have been constructed in the past; it is therefore not my intention to cover such devices broadly but merely intend i to cover such forms and modifications thereof as fall fairly within the appended claim.

I claim:

A tuyre member adapted to be arranged in an upright position to form a section of the upper portion of a fuel retort of an underfeed stolzer, and having when in such position, two upright portions, spagged apart, one ofwhich is wider than the other, a narrow portion connecting the lower ends of said portions and a top portion of the same width as said wider portion connecting the upper ends of said portions, said wider portions having a continuous fuel-engaging surface.l the outer portion of the top of the member being provided with a groove and the bottom with a retaining lug, said wider upright portion being provided in its lateral edges with channels extending from surface to surface and aflng from their middle portions to Said surfaces, the upright fuel-engaging face being slightly inclined outwardly and upwardly and the fuel-engaging face of the top being inclined downwardly and Outward] f.

- 3 CYRUS J. PARKER. 

